Retrieving images from mysql for rel usage problems

Retrieve the image from mysql to solve the rel usage problem. If the image is stored locally and used as follows, there is no problem. echo & nbsp; "& lt; a & nbsp; rel = res/test.jpg & nbsp; title = $ row [1] & nbsp ;........ if you store images in mysql in the mediablob format, and then retrieve the images from mysql for rel usage
If the image is stored locally and used as follows, there is no problem.
Echo"

If you store the image in mysql in the mediablob format and use a php file to read it, it will not work.
Echo"

Picshow_restaurant.php directly reads the image echo:
$ Row = mysql_fetch_object ($ result );
Header ("Content-type: image/JPEG", true );
Echo $ row-> picdata;

I don't know where the problem is. please ask. thank you.
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Maybe I don't know about rel. isn't the connection using the href attribute?
What is the relationship between rel and the target?
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1 rel = "..." with quotation marks
2. use href instead.